<template>
  <h4>和是：{{sum}}</h4>
  <button @click="sum++">点我和加一</button>
  <hr>
  <h2>原姓名：{{ name }}</h2>
  <h2>姓名：{{ name }}</h2>
  <h2>年龄：{{ age }}</h2>
  <h2>薪水:{{ job.j1.salary }}K</h2>
  
  <button @click="name += '!'">改名</button>
  <button @click="age++">增寿</button>
  <button @click="job.j1.salary++">加薪</button>
</template>

<script>
import { reactive, shallowReactive, ref, toRefs, readonly, shallowReadonly } from "vue";
export default {
  name: "Demo",
  beforeCreate() {},

  setup(props, context) {
    let sum = ref(0);
    let person = reactive({
      name: "张三",
      age: 18,
      job: {
        j1: {
          salary: 20,
        },
      },
    });

    person = readonly(person);
    //person = shallowReadonly(person);
    // sum = readonly(sum);

    return {
      sum,
      ...toRefs(person),
    };
  },
};
</script>